Understanding your CP51B notice

What this notice is about

We computed the tax on your Form 1040 or 1040-SR return. You're due a refund.

What you need to do

• Read your notice carefully. It explains how we calculated your refund.
• You don't need to do anything if you agree with our calculations.
• Contact us if you disagree with the amount of tax we computed.

Frequently asked questions

What should I do if I disagree with the notice? (updated Dec. 6, 2024)

You can write or call using our contact information found on your notice. If you write us, be sure to explain why you disagree and provide any information you have (such as cancelled checks, amended return, etc.) or have the paperwork ready if you call.

When will I receive my refund? (updated Dec. 6, 2024)

If you have’nt received your refund and if you don’t owe other taxes or other debts we’re required to collect, you should receive it within 2-4 weeks from the date of your notice.

Helpful information

• Publication 17, Your Federal Income Tax
• Publication 505, Tax Withholding and Estimated Tax PDF
• Publication 4134, Low Income Taxpayer Clinic List PDF
• Publication 4681, Canceled Debts, Foreclosures, Repossessions and Abandonments PDF

Tips for next time you file

Consider filing your taxes electronically. Filing online can help you avoid mistakes and find credits and deductions that you may qualify for. In many cases you can file for free.